CASTLE’s title character is hired to investigate a potential infidelity…but then he witnesses his client get murdered, seemingly, by her husband. With no solid evidence, Castle teams up with Beckett to figure out what went down. (It sounds a bit like the show’s 100th episode, though I imagine this time around, it’s not an elaborate ploy.)

Check out some photos from “I, Witness”…

CASTLE

CASTLE - "I, Witness" - Castle is hired to uncover if a client's husband is having an affair, but the case takes a shocking turn when Castle witnesses the client's murder - by her husband. But with no proof that the killing took place, Castle and Beckett must investigate to expose the truth, on "Castle," MONDAY, FEBRUARY 2 (10:01-11:00 p.m., ET) on the ABC Television Network. (ABC/Nicole Wilder)
SEAMUS DEVER